<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 消息提示 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 状态条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 标签页 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          tab-position="left"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称：" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格：" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="Number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量：" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="Number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量：" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="Number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类：" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProp"
                @change="changeCate"
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name + '：'"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :headers="headersObj"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success="handleSuccess"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>                                                                                                                       
<script>
import _ from "lodash";
export default {
  data() {
    return {
      activeIndex: "0",
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        attrs: [],
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "change" },
        ],
      },
      //商品分类级联选择器配置项
      cateProp: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
        expandTrigger: "hover",
      },
      //商品分类选项
      cateList: [],
      //商品参数
      manyTableData: "",
      //商品属性
      onlyTableData: "",
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      //图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      //预览图片的地址
      previewPath: "",
      //是否显示图片预览对话框
      previewVisible: false,
      goods_introduce: "",
    };
  },
  created() {
    this.getCateList();
  },
  mounted() {},
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length == 3) {
        return this.addForm.goods_cat[2];
      } else {
        return null;
      }
    },
  },
  methods: {
    //获取商品分类选项
    async getCateList() {
      const { data: res } = await this.$http.get(`categories`);
      if (res.meta.status == 200) {
        this.cateList = res.data;
      } else {
        this.$message.error(res.meta.msg);
      }
    },
    //商品分类改变时调用
    changeCate() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
        this.$message.error("请选择三级菜单中的商品");
      }
    },
    //切换标签页时触发
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName == 0 && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类！");
        return false;
      }
    },
    //切换标签页
    async tabClicked() {
      if (this.activeIndex == 1) {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "many" } }
        );
        if (res.meta.status == 200) {
          res.data.forEach((item) => {
            item.attr_vals =
              item.attr_vals.length == 0 ? [] : item.attr_vals.split(" ");
          });
          this.manyTableData = res.data;
          console.log(res.data);
        } else {
          this.$message.error(res.meta.msg);
        }
      } else if (this.activeIndex == 2) {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "only" } }
        );
        if (res.meta.status == 200) {
          this.onlyTableData = res.data;
          console.log(res.data);
        } else {
          this.$message.error(res.meta.msg);
        }
      }
    },
    //预览图片时的回调
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    //移除图片时的回调
    handleRemove(file) {
      // 1 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path;
      // 2 从pics数组中找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((item) => {
        return item.pic == filePath;
      });
      // 3 调用数字的splice方法，把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1);
      console.log(this.addForm);
    },
    //图片上传成功的回调
    handleSuccess(response) {
      //1 拼接得到图片信息
      let imgInfo = { pic: response.data.tmp_path };
      //2 将图片信息push到pics中
      this.addForm.pics.push(imgInfo);
      console.log(this.addForm);
    },
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          this.$message.error("请填写必要的表单项！");
          return;
        }
        //处理商品参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" "),
          };
          this.addForm.attrs.push(newInfo);
        });
        //处理商品属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          };
          this.addForm.attrs.push(newInfo);
        });
        //处理商品分类
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        const { data: res } = await this.$http.post("goods", form);
        if (res.meta.status == 201) {
          this.$message.success(res.meta.msg);
          this.$router.push('/goods')
        } else {
          this.$message.error(res.meta.msg);
        }
      });
    },
  },
};
</script>
<style lang='less' scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
  max-height: 350px;
}
.btnAdd {
  margin-top: 8px;
}
</style>